Panelboard Interior Convertible Main Lug Circuit Breaker Series EDB EDG EDJ Amps 250 A Short Circuit Current Rating 100000 RMS Symmetrical Number of Spaces 30 Voltage 277/480YV AC Phase 3 Bus Material Aluminum Recommended Enclosure 1D700 for Main Breaker 6B429 for Main Lug Circuit Breaker Type Plug In Miniature For Use With NF Circuit Breakers Height 33 in Depth 5 3/4 in Width 10 7/16 in Main Circuit Breaker Adapter Kit 22P070 Mfr No N250MKC